2426 	struct virtio_net_hdr vnet_hdr = { 0 };  in packet_snd()  local
2464 		vnet_hdr_len = sizeof(vnet_hdr);  in packet_snd()
2473 		n = copy_from_iter(&vnet_hdr, vnet_hdr_len, &msg->msg_iter);  in packet_snd()
2477 		if ((vnet_hdr.flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) &&  in packet_snd()
2478 		    (__virtio16_to_cpu(false, vnet_hdr.csum_start) +  in packet_snd()
2479 		     __virtio16_to_cpu(false, vnet_hdr.csum_offset) + 2 >  in packet_snd()
2480 		      __virtio16_to_cpu(false, vnet_hdr.hdr_len)))  in packet_snd()
2481 			vnet_hdr.hdr_len = __cpu_to_virtio16(false,  in packet_snd()
2482 				 __virtio16_to_cpu(false, vnet_hdr.csum_start) +  in packet_snd()
2483 				__virtio16_to_cpu(false, vnet_hdr.csum_offset) + 2);  in packet_snd()
2486 		if (__virtio16_to_cpu(false, vnet_hdr.hdr_len) > len)  in packet_snd()
2489 		if (vnet_hdr.gso_type != VIRTIO_NET_HDR_GSO_NONE) {  in packet_snd()
2490 			switch (vnet_hdr.gso_type & ~VIRTIO_NET_HDR_GSO_ECN) {  in packet_snd()
2504 			if (vnet_hdr.gso_type & VIRTIO_NET_HDR_GSO_ECN)  in packet_snd()
2507 			if (vnet_hdr.gso_size == 0)  in packet_snd()
2529 			       __virtio16_to_cpu(false, vnet_hdr.hdr_len),  in packet_snd()
2567 		if (vnet_hdr.flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) {  in packet_snd()
2568 			u16 s = __virtio16_to_cpu(false, vnet_hdr.csum_start);  in packet_snd()
2569 			u16 o = __virtio16_to_cpu(false, vnet_hdr.csum_offset);  in packet_snd()
2577 			__virtio16_to_cpu(false, vnet_hdr.gso_size);  in packet_snd()
2951 		struct virtio_net_hdr vnet_hdr = { 0 };  in packet_recvmsg()  local
2954 		vnet_hdr_len = sizeof(vnet_hdr);  in packet_recvmsg()
2964 			vnet_hdr.hdr_len =  in packet_recvmsg()
2966 			vnet_hdr.gso_size =  in packet_recvmsg()
2969 				vnet_hdr.gso_type = VIRTIO_NET_HDR_GSO_TCPV4;  in packet_recvmsg()
2971 				vnet_hdr.gso_type = VIRTIO_NET_HDR_GSO_TCPV6;  in packet_recvmsg()
2973 				vnet_hdr.gso_type = VIRTIO_NET_HDR_GSO_UDP;  in packet_recvmsg()
2979 				vnet_hdr.gso_type |= VIRTIO_NET_HDR_GSO_ECN;  in packet_recvmsg()
2981 			vnet_hdr.gso_type = VIRTIO_NET_HDR_GSO_NONE;  in packet_recvmsg()
2984 			vnet_hdr.flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;  in packet_recvmsg()
2985 			vnet_hdr.csum_start = __cpu_to_virtio16(false,  in packet_recvmsg()
2987 			vnet_hdr.csum_offset = __cpu_to_virtio16(false,  in packet_recvmsg()
2990 			vnet_hdr.flags = VIRTIO_NET_HDR_F_DATA_VALID;  in packet_recvmsg()
2993 		err = memcpy_to_msg(msg, (void *)&vnet_hdr, vnet_hdr_len);  in packet_recvmsg()